Sure,
http://primer.dynamobim.org/en/06_Designing-with-Lists/6-3_lists-of-lists.html
1. We will start with a simple 3D grid of points.
2. Since the grid is constructed with a Range for X, Y and Z, we know that the data is structured with 3 tiers: an X List, Y List and Z List.
3. These tiers exist at different **Levels** . The Levels are indicated at the bottom of the Preview Bubble. The list Levels columns correspond to the list data above to help identify which level to work within.
4. The List Levels are organized in reverse order so that the lowest level data is always in “L1”. This will help ensure that your graphs will work as planned, even if anything is changed upstream.
